/**
 * 0244
 *  
 * @Author : roryrywang
 * @DateTime : 2024/8/13 22:28
 */

#include <iostream>
#include <vector>

using namespace std;

class Solution {
public:
    void reverseString(vector<char> &s) {
        for (int i = 0, j = s.size() - 1; i < j; ++i, --j) {
            swap(s[i], s[j]);
        }
    }
};

int main() {

    return 0;
}